Browsing by Author "Eleftheriades, G. V."
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Book Chapter
Antenna Applications of Negative Refractive Index TransmissionLine (NRITL) Metamaterials
Eleftheriades, G. V.; Antoniades, Marcos A. (wiley, 2007)Onedimensional (1D) and to a lesser extent twodimensional negative refractive index transmissionline (NRITL) metamaterials and corresponding antenna applications have been presented. An expression for the total phase ...

Conference Object
Antenna applications of negativerefractiveindex transmissionline metamaterials
Antoniades, Marcos A.; Qureshi, F.; Eleftheriades, G. V. (2006)

Article
Antenna applications of negativerefractiveindex transmissionline structures
Eleftheriades, G. V.; Antoniades, Marcos A.; Qureshi, F. (2007)A number of new antennarelated applications that have recently been developed at the University of Toronto based on the concept of negativerefractiveindex transmissionline metamaterials are reviewed. These include ...

Conference Object
Applications of negativerefractiveindex transmissionline (NRITL) metamaterials in planar antennas and their feed networks
Antoniades, Marcos A.; Eleftheriades, G. V. (2007)Negativerefractiveindex transmissionline (NRITL) metamaterials and introduced and their fundamental properties are described. Following this, various applications using NRITLs are shown and their salient characteristics ...

Conference Object
A broadband 1:4 Series power divider using metamaterial phaseshifting lines
Antoniades, Marcos A.; Eleftheriades, G. V. (2005)A metamaterial 1:4 series power divider that provides equal power split to all four output ports over a large bandwidth Is presented. The divider comprises four nonradiating metamaterial lines In series that can each Incur ...

Conference Object
A broadband balun using metamaterial phaseshifting lines
Antoniades, Marcos A.; Eleftheriades, G. V. (2005)A 3port device that converts a singleended input to a differential output over a large bandwidth is presented. The balun comprises a Wilkinson divider, followed by a +90° negativerefractiveindex (NRI) metamaterial (MM) ...

Article
A broadband dualmode monopole antenna using NRITL metamaterial loading
Antoniades, Marcos A.; Eleftheriades, G. V. (2009)A printed monopole antenna is proposed which uses negativerefractiveindex transmissionline (NRITL) metamaterial loading in order to achieve a broadband dualmode operation. The metamaterialloaded monopole supports a ...

Article
A broadband series power divider using zerodegree metamaterial phaseshifting lines
Antoniades, Marcos A.; Eleftheriades, G. V. (2005)A metamaterial 1:4 series power divider that provides equal power split to all four output ports over a large bandwidth is presented, which can be extended to an arbitrary number of output ports. The divider comprises four ...

Article
A broadband Wilkinson balun using microstrip metamaterial lines
Antoniades, Marcos A.; Eleftheriades, G. V. (2005)A metamaterial balun that converts a singleended input to a differential output over a large bandwidth is presented. The device also exhibits excellent return loss, isolation, and through characteristics over the same ...

Conference Object
A compact and broadband NRITL metamaterial
Antoniades, Marcos A.; Eleftheriades, G. V. (2009)A compact and broadband negativerefractiveindex transmissionline (NRITL) metamaterial antenna is proposed,which consists of a conventional printed monopole loaded in a lefthanded fashion. The metamaterial loading ...

Article
A compact and lowprofile metamaterial ring antenna with vertical polarization
Qureshi, F.; Antoniades, Marcos A.; Eleftheriades, G. V. (2005)A compact (λ 0/11 footprint) and lowprofile (λ 0/28 height) metamaterial ring antenna is proposed using two metamaterial unit cells. Each constituent unit cell consists of negativerefractiveindex (NRI) microstrip ...

Article
Compact linear lead/lag metamaterial phase shifters for broadband applications
Antoniades, Marcos A.; Eleftheriades, G. V. (2003)A compact onedimensional phase shifter is proposed using alternating sections of negative refractive index (NRI) metamaterials and printed transmission lines (TL). The NRI metamaterial sections consist of lumped element ...

Conference Object
A compact lowprofile highimpedance surface for use as an antenna ground plane
Raza, S.; Antoniades, Marcos A.; Eleftheriades, G. V. (2011)A compact and lowprofile highimpedance surface is proposed which offers a significantly smaller footprint without affecting the usable reflection phase bandwidth of the structure. The unit cell of the proposed surface ...

Conference Object
A compact monopole antenna with a defected ground plane for multiband applications
Antoniades, Marcos A.; Eleftheriades, G. V. (2008)

Article
A compact multiband monopole antenna with a defected ground plane
Antoniades, Marcos A.; Eleftheriades, G. V. (2008)A compact multiband antenna is proposed that consists of a printed circular disc monopole antenna with an Lshaped slot cut out of the ground, forming a defected ground plane. Analysis of the current distribution on the ...

Article
A compact triband monopole antenna with singlecell metamaterial loading
Zhu, J.; Antoniades, Marcos A.; Eleftheriades, G. V. (2010)A compact triband planar monopole antenna is proposed that employs reactive loading and a defected groundplane structure. The reactive loading of the monopole is inspired by transmissionline based metamaterials (TLMTM), ...

Conference Object
Compact, linear, lead/lag phase shifters using negative refractive index metamaterials
Antoniades, Marcos A.; Eleftheriades, G. V. (2003)A new type of phase shifter using cascaded sections of NRI metamaterials and PRI transmission lines is proposed, which offers some significant advantages over conventional delay lines. The phase shifter is compact in size, ...

Conference Object
Compact, wideband and multiband antennas based on metamaterial concepts
Antoniades, Marcos A.; Zhu, J.; Selvanayagam, M.; Eleftheriades, G. V. (2010)In this review article, various antenna designs that are based on metamaterial concepts are presented which have been developed at the University of Toronto. Specifically, several antennas that are based on the zeroindex ...

Article
A CPS leakywave antenna with reduced beam squinting using NRITL metamaterials
Antoniades, Marcos A.; Eleftheriades, G. V. (2008)A reduced beamsquinting printed leakywave antenna (LWA) is proposed, comprising cascaded negativerefractiveindex transmissionline (NRITL) metamaterial unit cells. Each NRITL unit cell is implemented in coplanar ...

Conference Object
Enabling electromagnetic applications of negativerefractiveindex transmissionline metamaterials part II
Eleftheriades, G. V.; Antoniades, Marcos A.; Islam, R. (Institute of Electrical and Electronics Engineers Inc., 2004)The 1Dimensional (1D) metamaterial phaseshifting lines presented in [1] can be used to develop compact and broadband, nonradiating, metamaterial feednetworks for antenna arrays. These can be used to replace conventional ...